Physics I [Phys 161]                                            Spring 2005 Assignment #3 Reading, Vocabulary & Objectives A. Availability and Due Dates Assignment #3 is available Tuesday, February 8, 2005.  The target date for its successful completion is Friday, February 18, 2005.  In any event, all Mandatory Homework problems from Assignment #3 must be successfully completed and turned in by 5:00 pm on Tuesday, March 1, 2005.  If this requirement is not met, the student will not be allowed to take Exam 2, to be given in class on Friday, March 4, 2005.   B. Reading As preparation for completing the problems in Assignment #3, read Chapters 4 and 5 in Knight. C. Vocabulary As part of Assignment #3, the following vocabulary words must be understood and memorized: Contact Force, Long-Range Force, Free-Body Diagram, Net Force, Weight, Tension, Normal Direction, Normal Force, Static Friction, Kinetic Friction, Rolling Friction, Drag Force, Inertia, Inertial Mass, Static Equilibrium, Dynamic Equilibrium, Frame of Reference, Inertial Reference Frame (IRF), Non-Inertial Reference Frame (NIRF), Terminal Speed/Velocity, Fictitious Force, Apparent Weight, D. Objectives In addition to the Objectives listed on Assignments #1 and #2, after completing Assignment #3, the student should Know the definitions of those quantities listed in the vocabulary section above. Know the SI units in which any of the “dimensionful” quantities in the vocabulary section above are measured. Know the conversion between pounds and Newtons, and therefore know that a 1 kg mass at the surface of the earth weighs approximately 2.2 pounds. Have fluency with the use of exponential functions. Be comfortable taking derivatives of the exponential function. Be able to apply the ideas of Newtonian Mechanics to analyze simple systems in which the behavior is determined completely by these ideas. Be able to explain clearly the difference between weight and mass. Have familiarity with the types of forces found in the universe.  The student should be able to distinguish between forces that may be understood in terms of others, and those that currently appear to be “fundamental”.  When presented with a new “non-fundamental” force, the student should be able to suggest an explanation for the force in terms of “fundamental” interactions. Understand and be able to identify Inertial Reference Frames (IRFs). Understand the simple empirical relationship describing how many frictional forces behave.  The student must also be able to distinguish between static and kinetic frictional forces, and must be able to apply this knowledge in both static and dynamic situations.  Further, the student should be able to give a description of the microscopic processes and forces responsible for producing this empirical relationship. Be able to determine the drag due to air resistance acting on objects of moderate size that are traveling at moderate speeds through the lower atmosphere.